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MDEV-20157 perfschema.stage_mdl_function failed in buildbot with wrong result

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MDL wait consists of short 1 second waits (this is not configurable)
repeated until lock_wait_timeout is reached. The stage is changed
to Waiting and back every second. To have predictable result in the
test the query should filter all sequences of X, "Waiting for MDL", X,
leaving just X.
This commit is contained in:
Sergei Golubchik
2024-04-24 18:08:46 +02:00
parent 259394aed7
commit 7d5e08de6b
1 changed files with 17 additions and 6 deletions
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23
mysql-test/suite/perfschema/include/stage_setup.inc
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@ -121,12 +121,23 @@ begin
where thread_id = my_thread_id where thread_id = my_thread_id
and nesting_event_id = my_statement_id and nesting_event_id = my_statement_id
order by event_id asc; order by event_id asc;
# Ignore query cache as it may not be enabled # 1. Ignore query cache as it may not be enabled
select username, event_name, nesting_event_type # 2. MDL wait consists of short 1 second waits (this is not configurable)
from performance_schema.events_stages_history # repeated until lock_wait_timeout is reached. The stage is changed
where thread_id = my_thread_id # to Waiting and back every second. To have predictable result here
and nesting_event_id = my_statement_id and # the query filters all sequences of X, "Waiting for MDL", X,
event_name not like "%query cache%" # leaving just X.
with h as (
select event_id, username, event_name, nesting_event_type,
lag(event_name) over (order by event_id) = lead(event_name) over (order by event_id)
and event_name = "stage/sql/Waiting for stored function metadata lock" as v1,
lag(event_name, 2) over (order by event_id) = event_name
and lag(event_name, 1) over (order by event_id) = "stage/sql/Waiting for stored function metadata lock" as v2
from performance_schema.events_stages_history
where thread_id = my_thread_id
and nesting_event_id = my_statement_id and
event_name not like "%query cache%"
) select username, event_name, nesting_event_type from h where v1 is not true and v2 is not true
order by event_id asc; order by event_id asc;
end; end;
else else